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Why a 3-million-year-old lizard species in Arizona has virtually disappeared – CBS News


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A report from the United Nations determined that 1 million species are threatened with extinction. Dr. John Wiens from the University of Arizona believes that number is far higher based on his research. He says climate change is quickening the threat of extinction for species, including a 3-million-year-old lizard population previously found in the Arizona mountains.

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